Closure for cans.



E. M. LANG, JR. GLOSURE FOR CANS. I APPLICATION IILED MAY 6, 1912.

1,109,649, Patented Sept. 1, 1914.

a, A. W. @3

IHE NGkRIS PE-TERS CO. PNOTO-LITHO.. WASHINGTON. D- C "ap licat onfu aivia s,i912. s ena noieeassg.

- I "EDWARD M. nAive, an,

' .tion'Hof cans suchhsjare used mannin Jr., of'Portland, in the county of Cumuseful Improvements in is a specification. H a t I g My invention relates to the construccorn and other" food'- products and it .re-

lates. particularly to mproved means for closing the stud hole or mouth o f-the can. I The invention is designed to remedy several diiiiculties which hav hithertowbeen} experienced in the canning industry.

My invention will bemore readily understood by referrlng, tothe fac'c'ompanylng drawing wherein I have shown the old form of can closure and my improved forms.

In the drawing, Figure 1 is a vertical sectlon showing the form of can closurenow 1n common use,F1g. 2 1s a like section showing my improved fornn-Fig. 3 shows my improved cap provided with a solder ring, Fig. 4 shows myfimproved cap for'med to:

prevent close nesting, and 5 isaplan g 1 top 'and dis the'cap." Theedge ofthe" stud *hole ins'tead lof being depr'ess'edas-"i'n the of the form shown in. The difliculties of :the cans: has beenf'to form an annular This depression 5O downward depressionaround the stud hole, 1 the inner and lower edge'of thistlepression: being turned upward at an angle, forming} a plain edge over which the cap was fitted. i

This construction is shown in Fig. 1, in

which Z) is thefcan top with'the depressed; The cap 1 portion Z)? and turned up edge J9 consisted essentially of a disk a, thef-outer edge a of which'was turned down -to; rest in the depressedgroove or "channel formed by the upturned edge 6 of thestudhole opening. Two difficulties "are" found with this construction. In the first. place the portion 6 is depressed below the level of the can top in order to formthe groove or channel to receive the edge a of the cap. which commonly drops about I g; inch takes away just that much from the holding capacity of the can; The reason is that "the liquid contentsof the can cannot be allowed to come in contact with the can top for. fear of freezing or chilling the soldering too There is also danger of the contents of the can beingwscorched qcnosnnn TORGANSL in the canning industry referred to above areas follows: Thecommon practice of formingthe stud hol'es by the comparatively or burned? of the tool and this particularly UNIT D E P I T orries. I

true i of carbonar ceous material like syrup or condensed milk. e

space is thus commonly left between the topofthe material in the c an and" the an der side of the head of] the, can] and when the depressed groove encroaches on the interior of'thepan theflevel of the contents must be kept 10w enough to clearit- One phase of my invention consists in so forming the cap and the stud hole asjto avoid j I this depressedtfportion and; to bring the soldering jgr oove' up to the general level ofthe cantop, avoiding any encroachment upon the, available space within the can. Another difliculty withthe old construction is thatflthe inner jedge of the stud hole is" exposed afterthe' can is sealed to the action of the contentsof-lthe can and as it is not covered with the tin of the tin plate for thef'solder "used in sealing, thecap", it is liable to corrode and injure the-contents of the can. overcome this Ydifliculty; by so formingihe joint that both the plain edge of; the cap and of th'e to'p are-covered with solder. I

f Referring t6 6 represents the can "old form, is kept up. above the level of the bottom of thecan top by "forming an inner annular groove 9 in theuppe'r surface immediately adjacent' to the edge and an outer annular groove. h -on the under side immediately adjacent tothe groove g. The edgeff thus projects upward a'ndthe groove 9 forms a channel to receive -the down- ",vvard projecting. edge' of the cap. annular groove 7'- is formed on the under sidev of the cap immediately adjacent to the outer edge 15 and iililthis groove rests the v ea f'of the stud hole. As here shown, I

"form an inner annular groove y" on the cap 1 adjacent "to the 'groove' jj-thus bringing the "body of the cap up to a level above that of the can top.. The solder is applied with an annular. soldering steel in; the groove .g']

in the usual way and the result of the soldering operation will be a ring mfof solder in the groove 9 and a ring ofisolder k which will accumulatein the groove 'j on the un-,

der sideof the cap, workingthrough" the joint'between the overla'ping edges. The

covering o'fthe edge f o narrow "groove y formed on the under side of the cap with the top is caused g i ing and burning can. It is'evident the edge 7 lying in and partially filling the groove. The capillary attraction draws the solder through the joint and holds enough in the V-shaped recess the edge f when with the rgedge would beleft in Fig.1. In the case of Fig. 1, if any solder comes through it will fall into thecan since there is nothingto'hold it on the under side. It will be seen that by formingthe adjacent reversegroovesin the top surrounding the stud fhole, the-parts'are raised above the level of the under side of the top so that the full capacity-of the can may be utilized. A further advantage is that my construction tends to do away with the danger of scorchthe contents of the can where such substances as syrup end other carbonaceous material are canned. By raising the level of the soldering groove it is kept well away from the" contents of the the old construction to completely cover' uncovered as shown that the system of groov- I ing the topfor the purpose of raising it may 1 be used with the old form of cap and that the cap formed {to solder to. cover both plain edges may be i old form of j stud hole. 'Hitherto when it has beende-F' sired to provide 'the'caps with a solder ring} them, the solder has been applied to the cap'in the form of a flat ribbon which was crimped over the edge of the 5 cap. A cap formed as shown in Fig. 2 with I a distinct groove on the under side adjacent me to compress a ring of' solder in the bottom of such groplve', 1: an 2 the upper side adjacentto theouter groove,

1 said inner groove being divided into sec- 90 H tions b'y one or pressed, moldedor otherwise introduced into thegroove. I

rin'gmay be continuous or' it may beother-I in'the grooves, the essen-1 used in connection with the before applying to the outer edge enables I adjacent groove d a ring 1' of solder wise distributed tial thing being to provide solder enough toi form the joint perfectly. are liable to rest so closely In Fig. 3 I show one of my caps 27, with:

produce a double ring of:

The

Caps of this form}? that it is some-;

times difiicult to separatej them. This is} particularly so when they are automatically 5 of the cap. In Figs.

partitions.

fWitnesses:

fed in a cap dropping machine or a cap hemm-ing machine. To avoid this I may form this groove in segments, leaving between-the segments one or more of the partitions which are a continuation of the body 4 and 5 I show such a construotion-in which s is the body of the cap, 5 the groove, and u partitions separating the grooves into three sections. v When the caps are piled in a column one on another, there will -be a separation of the edges because the grooves will not nest perfectly on account of the presence of the Thus the separating blade or other device which may be used will easily 6 find its way between the caps" It will be seen that by the use of my invention I am enabled to utilize the entire depth of the can, covering the plain edge of the stud hole with solder so that no corrosion will take place. i

"It is evident that while I have herein shown my invention as applied to a can having a relatively small stud hole or opening it may equally'well be applied to what is called an open topped can in which the cap or closure occupies substantially the entire top of the can. The groove it instead of being a relatively narrow groove may be as wide as desired and may if desired eX- tend out to the edge of the can.

I claim I I A can cap adapted to form with other like caps, columns with relatively open joints or spaces said cap consisting of a metal disk having an outer annular groove formed on its under side immediately adjacent to its outer edge and an inner annular groove on more small plain portions in the same plane as the upper surface, to

prevent the caps from closely nesting.

Q In testimony whereofI have afiiXed my I signature, in presence of two witnesses.

EDWARD M. LANG, JR.

Sj. W. BATES, .C. B. GBEIGHTQN.

.. Gopieso fthis patent 'inayibe obtained for five cents each, addressing the Commissioner of Iatents,

' Washington, 13. 0. V 

